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Avatar for Alamo Lighting & Electric
Alamo Lighting & Electric
4.9(
39
)
Generator - Install - For Business

Serving Selma, TX and surrounding areas

Approved

In business since 2023

Free estimates

Emergency services offered

"So quick... performed the service the same day as the quote. They installed 3 new ceiling fans in a 22-foot tall room and made it look so simple. I will definitely call them back to do other electrical work around my home."
Response time1 day
Recommended by97%of homeowners
Avatar for Voltsmith Electric
Voltsmith Electric
5.0(
10
)
Portable Generator - Install

Serving Selma, TX and surrounding areas

Approved

In business since 2025

Emergency services offered

Warranties offered

Voltsmith Electric provides professional residential and commercial electrical services throughout New Braunfels and the greater San Antonio area. Our work is performed to focus on safe, code-compliant installations, proper diagnostics, and long-term solutions, not quick fixes.\n\nWe specialize in panel upgrades, dedicated circuits, EV charger installations, electrical troubleshooting, lighting upgrades, remodels and whole-home surge protection. Most projects begin with an on-site evaluation to ensure the correct solution and a clear scope of work.

Commercial Lighting
Electrician Mike
Hot Tub Power
Kitchen Lighting
Dining Light

+13

15 neighbors recently requested a quote
Blackthorn Electric LLC
4.9(
8
)
Generator - Install - For Business

Serving Selma, TX and surrounding areas

Approved

Super Service Award Winner

In business since 2015

Free estimates

Emergency services offered

"Ronnie was great with handling everything made me fill at ease i would highly recommend this company to anyone looking for a great electrician he was the only one out of 5 company that gave me a honest price I am happy that i use Blackthorn electric THANKS"
AUTOZONE
AUTOZONE
Response time2 hrs
12 neighbors recently requested a quote
Recommended by75%of homeowners
South Texas Source Electrical Contracting
5.0(
4
)
Generator - Install - For Business

Serving Selma, TX and surrounding areas

Approved

In business since 2024

Free estimates

Credit card accepted

"Lazaro Gonzales was my technician and he arrived at the exact time he was scheduled. He listened to what I wanted and offered better options. He explained what he was doing at every step and when he was done, he cleaned the area up better than it was when he arrived. I will hire Lazaro for all my electrical work from now on."
2 neighbors recently requested a quote
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Generator Install questions, answered by experts

Natural gas generators are designed to run for extended periods of time, such as power outages during a natural disaster. Since there’s no limit to the supply of natural gas, they don’t need to stop for refills. However, generators do need maintenance, including pauses to check and add oil. Constantly running them will also cause a lot more wear and tear, leading to a shorter lifespan.

With proper maintenance, a whole-house generator can last between 20 and 40 years. The specific lifespan depends on how often and for how long the generator is used, and some models may have their life expectancy rated in hours of operation. To maximize its lifespan, expect to spend around $150 to $300 per year for annual maintenance checks from a qualified technician. During these checks, a technician will inspect the engine filter, starting mechanism, fuel, lubrication, and coolant levels. Consulting your installer and choosing a low-impact fuel like natural gas or diesel can also help ensure your generator lasts as long as possible.

Sizing a generator is a careful process that requires calculating the electrical load of your entire house. You have to take into account every device you want to use and their wattage requirements, plus the wattage needed to start them, and look for a generator that can safely run all that at around 80% capacity.

In more practical terms, a small home can run on a 10,000-watt generator (and if you only want to power a few key appliances, much less than that). A mid-sized home may need something between 15,000 and 22,000 watts. Larger homes require 25,000 watts or more. 

Natural gas and electricity rates vary significantly based on location, and pricing can change over time, too. It’s possible that in locations where natural gas is particularly inexpensive, it will cost less than grid-based electricity will. However, you should also factor in the generator’s initial costs and maintenance needs, as well as its noise level and if it can comfortably power all your home appliances.

An undersized whole-house generator has the potential to overheat and shut down when you try to run a central AC system. This scenario can not only damage the whole-house generator, but can also trip your home’s breakers or cause electrical damage. To avoid this situation, hire a local generator installer to correctly size your whole-house generator.

The Selma, TX homeowners’ guide to generator installs

From average costs to expert advice, get all the answers you need to get your job done.